Los Angeles -LRB- CNN -RRB- -- Paul Walker 's brothers are helping `` fill in small gaps '' in `` Fast & Furious 7 '' action sequences not finished before the actor 's death , producers said Tuesday .

Walker died in a fiery car crash during a Thanksgiving break in filming last November , forcing a halt to production .

`` We had to take time to grieve Paul , the brother we love and lost , and to figure out if we should move on with our film , '' producers wrote to fans in a Facebook post Tuesday .

The decision to resume filming was `` the only choice , '' the note said . We believe our fans want that , and we believe Paul would want that , too . ''

Walker 's dramatic scenes were completed before his death but some action sequences were unfinished , they said .

`` We have resumed shooting and now welcome Paul 's brothers , Caleb and Cody , into our ` Fast ' family , '' the post said . `` Caleb and Cody are helping us complete some remaining action for their brother and fill in small gaps left in production . Having them on set has made us all feel that Paul is with us , too . ''

The movie was to have been released this summer , but Universal pushed it back to April 10 , 2015 .

`` This film is the most important we 've ever done together , '' the post said . `` It will allow the character of Brian O'Conner to live on and let us celebrate Paul in his most defining role . ''

Walker 's O'Conner character is a staple of the long-running and hugely profitable film franchise .

Directed by James Wan , it also stars Vin Diesel , Dwayne Johnson , Michelle Rodriguez and Jason Statham .

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Investigators concluded in a report released in March that speed was to blame in Walker 's death .

`` Investigators determined the cause of the fatal solo-vehicle collision was unsafe speed for the roadway conditions , '' Los Angeles County Sheriff 's Commander Mike Parker said .

The high-performance 2005 Porsche Carrera GT was going `` between 80 and 93 mph at the time the car impacted a power pole and several trees , '' the final report said . The posted speed limit on the Santa Clarita , California , office park road was 45 mph .

Walker , 40 , and friend Roger Rodas , 38 , had no drugs or alcohol in their blood , the report said . Both men were wearing seat belts .

The airbags deployed as they should have when the car clipped a light pole and several trees , investigators said . Nothing mechanical went wrong to cause the Porsche to leave the wide road . Investigators found `` no pre-existing conditions that would have caused this collision , '' the report said .

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Walker and Rodas , racing team partners , left a charity event at a car shop co-owned by the men to take a ride in an office park in the community of Valencia in Santa Clarita , about 30 miles north of Hollywood . The crash happened a few hundred yards away on a wide street .

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`` Caleb and Cody are helping us complete some remaining action , '' producers say

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`` Having them on set has made us all feel that Paul is with us , too , '' note to fans says

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Walker 's death last November forced a halt to production

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The movie was to have been released this summer , but was pushed to April 2015